Heated asphalt rollers



March 12, 1963 G. E. MALZAHN 3, 0,

- HEATED ASPHALT ROLLERS R Filed May 17, 1960 2 Sheets-Sheet l Gus E.Ma/zahn INVENTOR.

. 9 BY gimp L M March 12, 1963 G. E. MALZAHN 3,080,800

HEATED ASPHALT ROLLERS Filed May'1'7, 1960 2 Sheets-Sheet 2 Q Q2 .&

1N VEN TOR.

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United States Patent 3,080,800 HEATED ASPHALT ROLLERS Gus E. Malzahn,P.0. Box 66, Perry, Okla.

Filed May 17 1960, Ser. No. 29,623 4 Claims. (Cl. 94-50) This inventionrelates to heated rollers used for finishing asphalt surfaces.

It is therefore a primary object of this invention, to provide a rollerfor compacting asphalt surfaces by the weight of the roller andsimultaneously applying heat to the asphalt.

A further object of this invention in accordance with the foregoingobject, is to provide a heated asphalt roller having a novel burnerdisposed within the roller being supplied with gas from a tank mountedon top of the roller hood.

Another object of this invention in accordance with theforegoing'objects, is to provide a heated asphalt roller havingtheadvantage of being readily suspended for transport purposes.

A still further object of this invention is to provide a heated asphaltroller wherein the loss of heat from the roller is considerablyrestricted.

In accordance with'the foregoing objects, the roller in accordance withthis invention, includes a hood which encloses and rotatably mounts theroller, said roller being almost completely enclosed by the hood so astorestrict the loss of heat therefrom. A gas burner is disposed withinthe roller for heating thereof and is sup-plied with gas from a tankmounted in a novel and advantageous manner, directly above the hood bymeans of a mounting seat secured to the top of the hood while the tankis secured in its position by means of a clamp connected to a handleextending upwardly and rearwardly from a bracket connected to the hood.The handle is extensible and has an {adjustable bracket connectedthereto enabling the roller to be suspended from the side of the bed ofa truck.-

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described a'rid claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike ,numerals refer to like parts throughout, and in which:

' FIGURE 1 is 'a perspective view of the heated asphalt [rollerin'acco'rdance with this invention.

1 FIGURE 2 is atop view of the roller with the gas tan 'fremov'edtherefrom;

FIGURE 3 is a side elevational view'of the roller.]l

' FIGURE"4 isa front 'view of the roller with the gas .tank'r'emovedtherefr'om. I

FIGURE '5 tea" vertical central longitudinal sectional view takenthrough the roller'and roller hood FIGURE' 6' is" a vertical transversesectional view through the roller taken-th roughaplane indicated by- ESQiQU-HQQQ-TU IGURES. 1. I

Referring to the drawing in detail, reference numeral 10 generallyindicates the roller in accordance with this invention. Referring toFIGURE 1, the roller 10 includes a hood generally indicated by referencenumeral 12, a handle section 14, a roller generally indicated byreference numeral 16 extending below the hood 12 for contact with theasphalt surface to be rolled and a gas tank 18 vertically supported onthe hood 12 for supplying gas to a burner located within the roller 16as will be hereafter explained.

A bracket member 19 is disposed along the length of the hood 12rearwardly thereof and has a pair of tubular members 20 secured theretoas by welding at either end of the bracket 19. A pair of bent members 22are welded to the top of the hood forwardly thereof and are slidablyengaged within the tubular members 201 secured to the bracket 19 as moreclearly seen in FIGURES l and 3.

The handle portion 14 is connected to the bracket 19 and extendsrearwardly and upwardly therefrom. The handle portion 14 includes atubular member 24 within which a rod member 26 is adjustably mounted andis extensible so as to elongate the handle 14 to any desired height. Theend of the rod 26 terminates in a handle portion 28. The handle 14 ismaintained in adjusted position by means of a tubular member 30 throughwhich a bolt 34 extends in alignment with apertures 29 in the outertubular member 24 and corresponding apertures in the extensible rodmember 26 for holding the tubular member, and rod 26 in adjustedposition relative to the outer tubular member 24. Connected to thebottom of the tubular member 30 is a bracket member 32 by means of whichthe roller may be suspended from the side of a truck bed.

In order to position the gas supply tank 18 in illustrated verticallyaligned position, an annular sealing member 36 is secured to the top ofthe hood 12 as clearly shown in FIGURE 4, with the bottom of the gastank being seated therein in perfect vertical alignment above the hood12 so that the weight of the tank 18 will be useful to increase thecompacting weight of the roller without imposing an additional load forthe roller operator to support on the handle. In order to clamp the tank18 in position, a semi-cylindrical annular member 38 is provided, saidmember 38 being connected to a tubular member 42 which is connected tothe handle member 24 and braced by web member 44. A chain 40 isconnected to the member 38'so as to lock the tank 18 against the member38 in accurate vertically aligned position.

Referring now to FIGURE 5, the roller 16 is rotatably mounted within thehood 12 by means of a pair of axle stub shafts 46 and 48 connected tothe sides-of the hood 12. Within the axle shaft 48 connected to side ofthe hood 12, is a passage 50 communicating with a gas inlet nozzle 52threadedly connected at one end of the stub shaft 48 while the inletconduit 54 is connected to the passage 50 by means of a fitting, saidconduit 54 being connected to the top of the gas tank 18 for supply ofgas therefrom into and through the nozzle 52. The nozzle 52 therebysupplies gas to the burner located within the roller 16. The burnercomprises a tubular member 62 which is connected to the side wall 56which is connected to the ;roller 16 by means of angle plates 58 securedto as by welding to the inner walls of the roller 16 and by means ofbolts 60 to; the side wall 56 as shown in FIGURE 6. Connected to theinner end of the tubular member 62, is

a flame directing member 66 welded to the tubular member-62 but havingpassageways 68 through which the flame is directed into the spacebetween the-inner walls of the roller 16 and the outer surface of thetubular member 62 for more efficient heating of the rolling surface ofthe roller. Coaxially mounted within the tubular member 62 is a venturitype nozzle member 70 connected to the tubular'member 62 by radialmembers 64 through which air may pass into the tubular member 62 whileair enters passageways 76 at one end of the venturi member 70 located inthe end plate 72 of the venturi member 70 which end plate is connectedto a sleeve member 74 through which the stub shaft 48 extends to therebysupport the end of the roller 16 to which the burner is attached.Accordingly, the incoming air through passages 76 and gas from nozzle 52is to flare out as indicated by the arrows in FIGURE 5, while passingthrough the venturi member 70 while burning. Annular slots 78 areprovided in wall 56 of the roller which are in radial and axialalignment with the slots 84 in the side 80 of the hood, said side 80also having inner radial slots 86, for air intake purposes.

From the foregoing description, operation of the roller will beapparent. It will therefore be appreciated, that by reason of the novelarrangement of roller components and the novel burner unit locatedwithin the roller an unexpectedly high compaction is realized whenrolling asphalt with this roller. Furthermore, the adjustable featuresand restriction in the loss of heat from the roller because of the morecomplete enclosure by the hood, makes the roller in accordance with thisinvention more 'eflicient and more widely useful than was heretoforepossible.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention asclaimed.

What is claimed as new is as follows:

1. A heated asphalt roller suitable for rolling asphalt pavementcomprising, bracket means rigidly connected to a hood means, rollermeans journaled within said hood means, extensible handle meansconnected to said bracket means, seating means mounted on said hoodmeans vertically positioning and supporting a gas supply reservoir meansdirectly above said hood means, removable clamp means attached to saidhandle means for clamping said gas supply means in position, gas burnermeans mounted within said roller means at one end thereof andoperatively connected by conduit means to said gas supply means andexhaust passage means at the ends of said roller means and hood means,registerable whereby exhaust gases may be conducted away from thevicinity of the gas supply reservoir means, said gas burner meansincluding 'a tubular member mounted at one end on said one end of saidroller means, a fiame directing member connected to the other end ofsaid tubular member, venturi passage means rigidly fixed to said tubularmember and disposed centrally therewithin, a gas inlet nozzle connectedto said supply means and disposed within said venturi passage means, andair inlet means between said nozzle and one end of said venturi passage.

2. A heated asphalt roller suitable for rolling asphalt pavementcomprising, bracket means rigidly connected to a hood means, rollermeans journaled within said hood means, extensible handle meansconnected to said bracket means, seating means mounted on said hoodmeans vertically positioning and supporting a gas supply reservoir meansdirectly above said hood means, removable clamp means attached to saidhandle means for clamping said gas supply means in position, gas burnermeans mounted within said roller means at one end thereof andoperatively connected by conduit means to said gas supply means andexhaust passage means at the ends of said roller means and hood means,registerable whereby exhaust gases may be conducted away from thevicinity of the gas supply reservoir means, said hood means enclosingmore than half of the roller means, said gas burner means including atubular member mounted at one end on said one end of said roller means,a flame directing member connected to the other end of said tubularmember, venturi passage means connected to said tubular member anddisposed centrally therewithin, a gas inlet means connected to saidsupply means and disposed within said venturi passage means, first airinlet passage means disposed between said venturi passage means and saidtubular member and second air inlet passage means disposed between saidgas inlet and said venturi passage means.

3. A gas burner for a cylindrical asphalt roller rotata-bly mounted onaxial stub shafts fixed to a roller hood, comprising a tubular membercoaxially mounted to one end of said roller, a flame directing memberconnected to said tubular member at an inner end thereof, a venturinozzle coaxially mounted to and within said tubular member having aninner end spaced from said flame directing member and a gas inlet nozzlemounted in one of the axial stub shafts on which the roller isjournaled, coaxially extending into said venturi nozzle, exhaustpassages dis posed in one end of said roller, and said one stub shaftand gas nozzle projecting into and rotatably mounting said venturinozzle.

4. A heated asphalt roller suitable for rolling asphalt pavementcomprising, bracket means rigidly connected to a hood means, rollermeans journaled within said hood means, extensible handle meansconnected to said bracket means, seating means mounted on said hoodmeans vertically positioning and supporting a gas supply reservoir meansdirectly above said hood means, removable clamp means attached to saidhandle means for clamping said gas supply means in position, gas burnermeans mounted within said roller means at one end thereof andoperatively connected by conduit means to said gas supply means andexhaust passage means at the ends of said roller means and hood means,registerable whereby exhaust gases may be conducted away from thevicinity of, the gas supply reservoir means, said roller' havingcircular ends and said hood having part circular ends directly adjacentsaid circular ends, said exhaust passage means comprising first arcuateslots in at least one of said circular ends and second arcuate slots inat least one of said part circular ends adjacent said one circular end,said first and second slots becoming axially aligned during rotation, ofsaid drum.

References Cited. in the file of this patent UNITED STATES PATENTS1,053,572. Chatfield Feb. 18, 1913 1,463,962 McClintock Aug. 7, 19231,878,427 Ronstrom Sept. 20, 1932 2,294,168 Francis et al Aug. 25, 19422,626,496 Ritzert Jan. 27, 1953 2,664,683 DeCato Jan. 5, 1954 2,902,270Salomonsson et al Sept. 1, 1959 2,954,954 Larson Oct. 4, 1960 2,990,755Caufie ld July 4, 1961 3,007,379 Ellis Nov. 7, 1961 FOREIGN PATENTS549,995 France Dec. 4, 1 922

3. A GAS BURNER FOR CYLINDRICAL ASPHALT ROLLER ROTATABLY MOUNTED ON AXIAL STUB SHAFTS FIXED TO A ROLLER HOOD, COMPRISING A TUBULAR MEMBER COAXIALLY MOUNTED TO ONE END OF SAID ROLLER, A FLAME DIRECTING MEMBER CONNECTED TO SAID TUBULAR MEMBER AT AN INNER END THEREOF, A VENTURI NOZZLE COAXIALLY MOUNTED TO AND WITHIN SAID TUBULAR MEMBER HAVING AN INNER END SPACED FROM SAID FLAME DIRECTING MEMBER AND A GAS INLET NOZZLE MOUNTED IN ONE OF THE AXIAL STUB SHAFTS ON WHICH THE ROLLER IS JOURNALED, COAXIALLY EXTENDING INTO SAID VENTURI NOZZLE, EXHAUST PASSAGES DISPOSED IN ONE END OF SAID ROLLER, AND SAID ONE STUB SHAFT AND GAS NOZZLE PROJECTING INTO AND ROTATABLY MOUNTING SAID VENTURI NOZZLE. 